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Sheer line

by Lewis Carroll
written by Lewis Carroll

Sheer line – The line that separates the horizon and the vertical is called a vertical line. On the celestial sphere, it crosses the orbit at the zenith and nadir points. By the name, it can be understood that the vertical line is set by the direction of the plumb line.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

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